| 摘要 |
This invention provides a computerized apparatus and method which involves light projection to enable takeoffs and estimations from job plans which can be represented either in paper form or as light projections themselves. The apparatus has a light projector which is capable of projecting a cursor image coincidentally with a microfilm projection of the plans in one mode, and can be easily switched to project the cursor image onto paper plans in a second mode. A computer is connected with that light projector to control the movement of the cursor on the plans in such a manner that a user of the system can make takeoffs and estimations with the computer.
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